找不到'id'= 3的工作

Question

創建新作業時，您將被重定向到顯示頁面（/ jobs / [：id]）。 但是，當您嘗試重新加載頁面或編輯作業時，標題中會出現錯誤。 有set_job，據我所知已正確設置，並被標記為錯誤。

這是一個控制器：

class JobsController < ApplicationController
  before_action :set_job, only: [:show, :edit, :update]
  before_action :authenticate_user!, except: [:show, :index]

  def index
    @jobs = Job.published.order('created_at DESC').paginate(:page => params[:page], :per_page => 20)
  end

  def show
  end

  def new
    @job = Job.new
  end

  def edit
  end

  def create
    @job = Job.new(job_params)

    respond_to do |format|
      if @job.save            
        format.html { redirect_to @job }
        format.json { render :show, status: :created, location: @job }
      else
        format.html { render :new }
        format.json { render json: @job.errors, status: :unprocessable_entity }
      end
    end
  end

  def update
    respond_to do |format|
      if @job.update(job_params)
        format.html { redirect_to @job }
        format.json { render :show, status: :ok, location: @job }
      else
        format.html { render :edit }
        format.json { render json: @job.errors, status: :unprocessable_entity }
      end
    end
  end


  private

    def set_job
      @job = Job.find(params[:id])
    end

    def job_params
      params.require(:job).permit(:name, :description, :image, :location, :deleted, :user_id, :tag_list)
    end

end

日志：

Job Load (0.3ms)  SELECT  "jobs".* FROM "jobs"  WHERE "jobs"."id" = $1 LIMIT 1  [["id", 3]]                                                                                         
Completed 404 Not Found in 74ms                                                                                                                                                       

ActiveRecord::RecordNotFound (Couldn't find Job with 'id'=3):                                                                                                                         
  app/controllers/jobs_controller.rb:56:in `set_job'

日志第2部分

Started POST "/jobs" for 188.246.77.192 at 2014-09-20 22:11:03 +0000                                                                                                                  
Processing by JobsController#create as HTML                                                                                                                                           
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"8gO/Q8ktERzKdMzDtB8KEU6CH8oIayNAb2AZhUzL2d0=", "job"=>{"name"=>"My first job", "description"=>"test", "tag_list"=>"rails, programmi
ng", "location"=>"Red River, United States", "user_id"=>"1"}, "_wysihtml5_mode"=>"1", "commit"=>"Submit"}                                                                             
  User Load (0.5ms)  SELECT  "users".* FROM "users"  WHERE "users"."id" = 1  ORDER BY "users"."id" ASC LIMIT 1                                                                        
   (0.2ms)  BEGIN                                                                                                                                                                     
  SQL (0.4ms)  UPDATE "users" SET "updated_at" = '2014-09-20 22:11:03.154670', "last_seen_at" = '2014-09-20 22:11:03.154670' WHERE "users"."id" = 1                                   
   (4.3ms)  COMMIT                                                                                                                                                                    
   (0.2ms)  BEGIN                                                                                                                                                                     
  User Load (0.5ms)  SELECT  "users".* FROM "users"  WHERE "users"."id" = $1 LIMIT 1  [["id", 1]]                                                                                     
   (0.3ms)  SELECT COUNT(*) FROM "jobs"  WHERE "jobs"."user_id" = $1 AND ("jobs"."created_at" BETWEEN '2014-09-20 00:00:00.000000' AND '2014-09-20 22:11:03.168092')  [["user_id", 1]]
  SQL (0.3ms)  INSERT INTO "jobs" ("created_at", "description", "location", "name", "tag_list", "updated_at", "user_id") VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING "id"  [["create
d_at", "2014-09-20 22:11:03.170612"], ["description", "test"], ["location", "Red River, United States"], ["name", "My first job"], ["tag_list", "rails, programming"], ["updated_at", 
"2014-09-20 22:11:03.170612"], ["user_id", 1]]                                                                                                                                        
   (3.0ms)  COMMIT                                                                                                                                                                    
Redirected to http://example.com/jobs/3                                                                                                                
Completed 302 Found in 27ms (ActiveRecord: 9.6ms)  

Answer 1

工作

底線是，你不會有Job在你的數據庫的id的3 -的方式來固定，將來自確定為什么這並得到填充。

具體來說，您可能會遇到save方法或database 。 這是我要解決的方法：

#app/controllers/jobs_controller.rb
class JobsController < AppicationController
   def new
      @job = Job.new
   end

   def create
      @job = Job.new job_params
      @job.save
   end

   private

   def job_params
      require(:job).permit(:x, :y, :z)
   end
end

您已經擁有控制權-因此，問題可能出在將數據保存在數據庫中的方式上。 這可能是您的model或save機制本身存在的問題。

您的模型應如下所示：

#app/models/job.rb
class Job < ActiveRecord::Base
   belongs_to :user
end

#app/models/user.rn
class User < ActiveRecord::Base
   has_many :jobs
end

這將確保您的模型不會引起問題。 關於您擁有的validations可能還有另一個問題-您應該注釋掉 Job模型中的任何驗證 ，只是為了檢查它是否正確提交

-

D B

您應進一步確保您為Job model設置了正確的db

為此，您需要確保已完成以下操作：

$ rake db：migrate

當然，如果您以前為模型創建了正確的遷移，這當然是正確的！

---

最后，您將能夠使用rails console檢查數據庫中job記錄的存在：

> $ rails c
> $ jobs = Job.all
> # -> all jobs outputted

由此，您將能夠看到記錄的插入位置，從而可以查看保存的記錄發生了什么